Human remains discovered in a shallow grave in Riverside County more than 40 years ago have been identified as those of Thelma Gaston, a wealthy Los Angeles real estate investor whose boyfriend was convicted of her murder despite investigators never recovering her body, authorities said.
The Riverside County Sheriff's Coroner's Bureau announced the identification this week after investigators used advances in DNA technology and investigative genetic genealogy to solve the decades-old mystery. Gaston disappeared from Los Angeles in 1981.
A passerby gathering firewood discovered the skeletal remains in a shallow grave near Sugarloaf Mountain and the Pinyon Crest community in November 1981. Investigators were unable to identify the victim because the remains were severely decomposed.
The breakthrough came after the coroner's bureau reopened the case with funding from the Missing and Unidentified Human Remains Grant.
Investigators worked with the Riverside Cold Case Homicide Team and Othram Labs, a Texas-based forensic laboratory, to develop a DNA profile. Investigative genetic genealogy and dental records were then used to confirm the remains belonged to Gaston.
Authorities said Gaston was the victim of a homicide investigated by the Los Angeles Police Department. Detectives concluded her boyfriend, Lawrence Remsen, killed her and concealed the crime by claiming she had disappeared.
Remsen was prosecuted by the Los Angeles County District Attorney's Office and convicted of murder. He was sentenced to life in prison, making the case one of Southern California's earliest successful murder prosecutions without the victim's body being recovered.
Officials said the identification highlights how advances in forensic DNA testing continue to help investigators solve cold cases that had gone unsolved for decades. Investigative genetic genealogy has become an increasingly common tool for identifying unidentified human remains and generating leads in homicide investigations.
The identification brings a measure of closure to a case that spanned more than four decades and demonstrates how modern forensic techniques can answer questions that once seemed impossible to resolve.